Effect of drought stress and silica spraying on some physiological and functional traits of canola cultivars

This experiment was designed with the aim of evaluation of the effect of silica spraying on physiological and functional reactions of canola cultivars under drought stress conditions during stages of stem elongation to flowering, podding and filling the grains in field conditions during the 2016-2017 season. The factors studied included different canola cultivars: Hyola 401 (V1), Agamax (V2), Jacamo (V3) and Jerry (V4); drought stress levels DI (normal irrigation), D2 (high stress conditions in stage of stem elongation to flowering), D3 (high stress conditions in stage of flowering, D4 (high stress conditions in stage of podding, D5 (high stress conditions in stage of grain filling) and spraying levels 0 (S0) and 30 mM (S1). Silica spraying has a positive effect on the amount of proline in drought stress conditions. The highest and the lowest amount of prolinc were observed in D3S1 (24.38 mg g(-1) FW) and DI SO (12.85 mg g(-1) FW), respectively. The results showed that silica spraying improved the ability of canola cultivars to respond to drought stress by increasing physiological and functional traits.